JP2627396B2 - Water and methanol inhaler for automotive diesel engines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the purification of exhaust gas from automobiles. Nitrogen oxides and black smoke emitted by diesel engines have been raised as social problems such as adverse effects on health. The purpose is to prevent pollution.

[0002]

2. Description of the Related Art To reduce nitrogen oxides emitted from diesel engines, E.I. G. FIG. R (exhaust gas recirculation method) and methods such as exhaust gas reburning are employed to prevent the emission of black smoke.

[0003]

In order to improve the combustion efficiency of a diesel engine, the ratio between fuel and intake air must be increased.
To bring the air-fuel ratio close to the stoichiometric air-fuel ratio. When approaching the stoichiometric air-fuel ratio, the thermal efficiency is improved, the combustion temperature rises, and the amount of oxygen in the intake air with respect to the fuel becomes excessive. Is enormous. When the amount of nitrogen oxides is reduced by making the fuel rich, the generation of black smoke increases at high revolutions, rapid acceleration, and the like. When the fuel is lean, the emission of black smoke is reduced, but the output is reduced. When the amount is too small, the exhaust of black smoke is increased due to incomplete combustion. Therefore, it is an object to achieve the reduction of the above harmful emission substances without reducing the output.

[0004]

The present invention employs a method in which a water and methanol evaporator is provided in a suction circuit, and water and methanol are evaporated and vaporized by the wind force of the intake air, mixed into the intake air and sucked into the combustion chamber. Then, when the engine is burning, the combustion temperature is lowered by the water vapor in the mixed intake air that is drawn, and the ratio of the oxygen amount in the intake air is reduced by the suction of the water vapor.
Nitrogen oxide formation is reduced. The inhaled vaporized methanol enhances the combustion effect, so that the amount of black smoke emission can be reduced. In addition, the thermal expansion of steam and the increase in output due to the combustion of methanol lead to a reduction in fuel (light oil) consumption. Solve.

[0005]

The steam generator and vaporized methanol generated in the intake circuit generate steam and vaporized methanol, and the amount of suction is adjusted by a flow control valve to supply it to the cylinder combustion chamber. The inhaled intake air containing steam and vaporized methanol is converted into N ₂ + H ₂ O + CO ₂ by combustion, and the harmful emissions N
Reduce emissions of Ox, HC, CO and black smoke.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, a branch intake pipe (2) is bonded to an intake pipe (1) of an engine to be mounted in such a manner that an inflow port and an outflow port are aligned in an intake flow direction. In the center of the branch intake pipe, a cylindrical steam generating cylinder (4) is formed from a water-permeable material such as cotton cloth, felt, sponge, etc., and the lower part thereof is used as a water sucking part to reach the water storage chamber (3).
Install and cover with an outer cylinder. In the water storage chamber, a methanol mixed water is guided from a water tank (7) installed in advance by a pipe (8), and is stored to maintain a required water level by a float valve (9). Is stored so as to be water-containing. Inside the steam generating tube material, a heating tube (5) for circulating hot water for cooling the engine is formed in a coil shape of a thin tube in order to enhance the steam generating effect.
It is embedded in or circumscribed in the material. Both ends of the heating pipe are connected to a water supply section to the radiator of the engine and to an inflow section from the radiator with hoses, respectively, to flow water. A flow control valve (6) is provided at the outlet of the branch intake pipe, and the control valve (12) is installed inside the intake pipe near the intake manifold (10) and operated by a signal from a humidity sensor (11). Control the opening / closing degree of steam and adjust the flow rate of steam-mixed intake air. When the air in the intake pipe and the branch intake pipe is flowed in by the rotation of the engine, the steam generating cylinder
Since the methanol mixed water is sufficiently penetrated by natural suction (capillary phenomenon) and heated by a heating pipe so that steam is easily generated, the wind force of the intake air passing through the inner surface of the generating cylinder (surface vaporization) ), The appropriate amount of steam,
Evaporated methanol is generated. The generated steam is mixed into the intake air, adjusted to an appropriate amount by a humidity sensor, a control mechanism, and a flow control valve, and is sucked into the cylinder combustion chamber. The intake air mixed with water vapor and vaporized methanol sucked into the fuel chamber lowers the combustion temperature by the water vapor at the time of engine combustion. G. FIG. As in the case of R, the content of oxygen is reduced, so that the generation of nitrogen oxides is also reduced. Vaporized methanol promotes fuel combustion and enhances the fuel effect, reduces the generation of black smoke, increases the output due to the thermal efficiency of methanol itself, and can reduce the consumption of injected fuel (light oil). In order to achieve the object of the present invention, a method of directly inhaling water and a methanol mixture using a carburetor and an injection valve similar to a gasoline engine can be considered, but water and methanol are compared with gasoline. , Vaporization is not easy and it is difficult to obtain an effect. Therefore, a method of inhaling water and methanol that has been vaporized in advance is adopted. In the embodiment, the branch intake pipe is installed in the intake circuit. However, a steam generating cylinder can be directly installed in the intake pipe. In that case,
It is also possible to provide a shielding plate on the surface of the steam generating cylinder and slide and control the shielding plate to control and adjust the amount of generated steam. As for the heating pipe, if the surface area in contact with the intake of the steam generating material can be increased, the installation of the heating pipe can be omitted.
Since the amount and speed of intake air flowing through the intake pipe are substantially proportional to the rotation speed of the engine, the flow control valve mechanism can be omitted by setting the amount of generated steam and the amount of flow to appropriate amounts. The present invention is characterized in that the apparatus is simple, methanol (methyl alcohol) as a fuel is relatively inexpensive, easily available, and easy to implement.

[0007]

The output of a diesel engine is high, but there is a problem in reducing and purifying exhaust harmful substances, and it is said that a methanol engine whose exhaust is clean has insufficient output. The present invention combines both of them with water vapor to measure the effects of purifying exhaust gas and reinforcing output. Methanol (CH ₃ OH) which is easily mixed with water and has a boiling point close to that of water.
Is evaporated and vaporized together with water, and the above effect is achieved by a method of inhaling it into a diesel engine.

[Brief description of the drawings]

FIG. 1 is a front view of the present apparatus (a partial cross section is shown).

FIG. 2 is a schematic diagram showing an arrangement of the apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Intake pipe 9 Float valve 2 Branch intake pipe 10 Intake manifold 3 Water storage chamber 11 Humidity sensor 4 Steam generating cylinder 12 Control mechanism 5 Heating pipe 13 Engine 6 Flow control valve 7 Water tank 8 Piping

──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location F02M 25/00 F02M 25/00 R 25/022 37/00 341C 25/032 341H 37/00 341 25 / 02 CJT (56) Reference JP-A-48-48825 (JP, A) JP-A-62-17356 (JP, A) JP-A-50-48324 (JP, A) JP-A-56-12044 (JP, A) JP, A) JP-A-48-6118 (JP, A) JP-A-53-41632 (JP, A) JP-A-60-209658 (JP, A) JP-A-2-176118 (JP, A) Hei 1-252655 (JP, B2) Jiko 45-16805 (JP, Y1) Jiko 23-1856 (JP, Y1)

Claims (1)

(57) [Claims] 1. A branch intake pipe (2) provided adjacent to an intake pipe (1) of an intake circuit of an automobile diesel engine, a cotton cloth,
A water / methanol vapor generating cylinder (4), which is formed into a cylindrical shape with a water-permeable material such as felt and sponge, the lower part of which is made to reach a water storage chamber (3) as a sucking part, and is always hydrated; A heating pipe (5) buried or circumscribed inside the cylinder and formed into a coil shape so as to circulate hot water for cooling the engine so as to enhance the steam generation effect;
By means of a device comprising a flow control valve (6) provided so as to allow an appropriate amount of water and methanol vapor mixed intake air to be sucked into the combustion chamber, water,
Evaporate and evaporate methanol (methyl alcohol)
Inhaled into the engine combustion chamber, during combustion, water vapor mixed into the intake air, the action of vaporized methanol, nitrogen oxides,
A water and methanol inhaler for automotive diesel engines, characterized by achieving a reduction in harmful emissions such as black smoke.